Ok ,my errors I got. Some places in the game, like when light shines through a nother source, or from behind another source and it makes those "light beams" It slows down to a crawl. To below 5FPS. Also when I am near a dog, (and only the dogs do this) FPS also drops right down to below 10FPS.

I have found this to be my 8800 GTS card, because when I install both my 7800GTX cards in SLI, I don't have the issue! Smooth sailing start to finish. So it's a driver or compatibility issue with my 8800 (eventhough I went through 6-8 different drivers)